In: Biology
Build a Punnett square to represent each junction. Indicate gamete proportions, progeny proportions (each table) and summarize phenotypes.
a. BBMM X BrMm
b. BrMm X BrMm
c. BrMm X rrmm
BM | BM | BM | BM | |
BM | BBMM | BBMM | BBMM | BBMM |
Bb | BBMb | BBMb | BBMb | BBMb |
rM | BrMM | BrMM | BrMM | BrMM |
rb | BrMb | BrMb | BrMb | BrMb |
This punnet square represents BBMM x BrMm
4 genotype present BrMm
4 phenotype BrMM
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype
b))BrMm x BrMm
BM | Bm | rM | rm | |
BM | BBMM | BBmM | rBMM | rBmM |
Bm | BBMm | BBmm | rBMm | rBmm |
rM | BrMM | BrmM | rrMM | rrmM |
rm | BrMm | Brmm | rrMm | rrmm |
2 trait cross
16 squares
9 unique allele combinations
Genotype | Count | Percent |
rBmM | 4 | 25 |
BBmM | 2 | 12.5 |
rBMM | 2 | 12.5 |
rBmm | 2 | 12.5 |
rrmM | 2 | 12.5 |
BBMM | 1 | 6.3 |
BBmm | 1 | 6.3 |
rrMM | 1 | 6.3 |
rrmm | 1 | 6.3 |
C))BrMm x rrmm
BM | Bm | rM | rm | |
rm | BrMm | Brmm | rrMm | rrmm |
rm | BrMm | Brmm | rrMm | rrmm |
rm | BrMm | Brmm | rrMm | rrmm |
rm | BrMm | Brmm | rrMm | rrmm |
4 unique allele combination
4 nos BrMm, 4 Brmm,4 rrMm,4 rrmm are the genotypes